Abstract
Two new glucosides and two known ester glucosides have been isolated from Geum japonicum. The two new glucosides were isolated by formation of their acetates and were identified as glucosides of 2-isopropyl-5-methylhydroquinone by chemical and spectral studies. The two known ester glucosides were identified as niga-ichigoside F1 and suavissimoside F1 by direct comparison with authentic samples. 2α,19α-Dihydroxyursolic acid and the known glycoside, gein, were also isolated from the same plant, in addition to a mixture of 2α-hydroxyursolic acid and 2α-hydroxyoleanolic acid.
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